<template>
  <!-- 头部部分 -->
  <header class="header">
    <h1>todos</h1>
    <input
      class="new-todo"
      placeholder="请输入任务名称"
      autofocus
      v-model="value"
      @keyup.enter="add"
    />
  </header>
</template>

<script>
export default {
  data() {
    return {
      value: "",
    };
  },
  methods: {
    add() {
      if (this.value.trim() === "") return alert("请正确填写");
      this.$emit("handleAdd", this.value);
      this.value = "";
    },
  },
};
</script>

<style></style>
